Loom shuttle



A. J. PICARD LOOM-SHUTTLEY Dec.. 30, 1969 Filed July 195 mm m w Adhemar P/c d ATTORNEYS United States Patent 3,486,535 LOOM SHUTTLE Adhemar J. Picard, New Bedford, Mass., assignor to A. J.

Picard & Company, Inc., New Bedford, Mass., a corporation of Massachusetts Continuation-impart of application Ser. No. 644,160,

June 7, 1967. This application July 19, 1968, Ser.

Int. Cl. D03j /24, 5/20 U.S. Cl. 139196 Claims ABSTRACT OF THE DISCLOSURE This application is a continuation-in-part of application Ser. No. 644,160 filed June 7, 1967, now abandoned.

The background and objects Loom shuttles which have herebefore been used generally comprise a housing for the filling yarn bobbin, the interior walls of the housing being lined with fur, metallic springs, sponge rubber or like material for maintaining tension on the thread and preventing looping thereof. It has been found that when looms are operated at a high rate of speed from 200 to 300 picks per minute, such extraneous tensioning members fail to prevent the yarn of the filling from looping as high as two inches above the shuttle, especially when the shuttle comes in on the right hand side of the shuttle box.

It is an object of the present invention to provide a loom shuttle adapted for high speed operation, which shuttle maintains a constant uniform tension on the filling thread to prevent looping, without the use of extraneous tensioning members.

Another object is to provide a loom shuttle which is constructed to exert pneumatic pressure against the filling thread when the loom is operated, to exert the proper tension on the filling at all times and thereby prevent looping of the filling yarn above the shuttle.

A further object is to provide a loom shuttle of the character described which includes a housing having conventional longitudinal slots in the side walls thereof, and which additionally includes a longitudinal slot in the backwall, through which air enters the housing under pressure, the slot being in opposed relation to the filling yarn bobbin within the housing.

A still further object of this invention is to provide a loom shuttle wherein the need for extraneous tensioning means on the interior walls of the shuttle housing is obviated.

Other objects will be manifest from the following description of the preferred form of the invention, taken in conjunction with the appended drawings, wherein:

FIGURE 1 is a rear elevational view of a loom shuttle constructed in accordance with the present invention,

FIGURE 2 is a longitudinal sectional view of the same,

FIGURE 3 is a section view taken along the line 33 of FIGURE 2, looking in the direction of the arrows, and

FIGURE 4 is a fragmentary, longitudinal sectional view of a modified form of the present invention.

Description of FIGURES 1 to 3 Referring now in greater detail to the drawing, there is illustrated a draper high speed shuttle of conventional type including a hollow body or housing generally designated 10, which is of rectangular cross section, the ends of which taper and terminate in metal tips designated 12 and 14. Housing 10 includes a front 16, a rear 18 and sides 20. Sides 20 are provided with the usual longitudinal slots 22 for ready access to a filling yarn bobbin 24 which is held within housing 10 by resilient means 26. Filling yarn strand 28 extends from the bobbin through conventional guide member 23 at one end of the shuttle. The front of the shuttle is provided with a filling cutter opening 30 and a filling feeler opening 32.

In accordance with the objects of the present invention, the rear of the shuttle is provided with a longitudinal slot 34 which is directly opposed to the location of filling yarn bobbin 24 mounted in housing 10. As shown to advantage in FIGURES l and 2, slot 34 extends through practically the entire length of the bobbin and is substantially coextensive with the height thereof, in order to effect the desired pneumatic pressure against the filling yarn, for carrying out the objects of the present invention.

In the use of a conventional shuttle, rectangular slot 34 is in a range of 4 inches to 5 inches in length and inch to V inch in height a slot measuring 4 inches in length and /2 inch in height having been found to give optimum results when the loom is operated at various speeds up to 300 picks per minute.

Operation Upon operation of a loom embodying the shuttle of the present invention, as the shuttle is moved back and forth, filling yarn 28 is fed through guide member 23. Air passing through the loom reed enters slot 34 under pressure, producing a wall of air which impinges on the filling yarn and tensions the same as it is fed from the bobbin. This maintains the filling yarn tight as the shuttle moves back and forth at speeds of 184 to 300 picks per minute and prevents the formation of loops in the thread. A uniform filling tension of only 12 grams is required with the present shuttle.

Description of FIGURE 4 In FIGURE 4, there is illustrated a .modified form of the loom shuttle of the present invention. In this form of the invention, the shuttle is bascially of the same construction as in the form of the invention illustrated in FIGURES 1 to 3, and like parts are accordingly identified by like, primed members.

This particular form of the invention is especially adapted for use with synthetic filling yarns such as rayon wherein greater tensioning is desirable. For this purpose, a strip of fur or like material, designated 36, is affixed in any suitable manner to the inner front wall proximate filling cutter opening 30, the fur being engaged with the filling yarn on the bottom. This exerts tension on the filling yarn in addition to that exerted by pneumatic pressure through slot 34'.

A shuttle constructed in accordance with the present invention enables a loom to be operated at high speeds up to 300 picks per minute without looping or breaking of the filling thread and without the use of extraneous devices within the shuttle housing for exerting tension on the filling thread.

With the shuttle of the present invention, new and simplified pneumatic means are provided for preventing thread looping which permits the loom to be operated at high speed with resultant increased production. It has been found that in actual practice, the production of textile goods may be increased by at least 30 percent and defects and filling breakage reduced by 50 percent, by virtue of using a shuttle constructed in accordance with the present invention as compared with shuttles previously employed.

While there have been herein shown and described the presently preferred forms of the present invention, it is to be understood that various changes may be made therein Within the scope of the claims hereto appended.

What I claim is:

1. A loom shuttle comprising:

(a) a housing having a front, back and sides, said sides having longitudinal slots,

(b) a filling yarn bobbin mounted within said housing,

(c) guide means for training the filling yarn from said bobbin through an opening in the housing, and

((1) means for directing a wall of air under pressure through the housing for direct impingement on the major portion of the filling yarn on the bobbin to maintain the filling yarn under tension and prevent looping thereof as it is fed from the shuttle.

2. The loom shuttle of claim 1, wherein:

(a) said means includes a longitudinal slot in the housing wall through which air under pressure passes upon back and forth movement of the shuttle at high speed, and impinges on the filling yarn.

3. The loom shuttle of claim 2, wherein (a) the longitudinal slot is located in the back of the shuttle.

4. The loom shuttle of claim 3, wherein (a) the longitudinal slot is in opposed relation to the filling yarn bobbin and is substantially coextensive with the length and height of the bobbin.

5. The loom shuttle of claim 1, with the addition of (a) tensioning means secured to the inner front wall of the housing,

(b) said tensioning means being in engagement with the filling yarn on the bobbin.

6. The loom shuttle of claim 5 wherein (a) said tensioning means comprises a strip of fur approximately two inches in length.

7. In a loom shuttle comprising an elongated housing having a filling yarn bobbin mounted therein and a guide member for training the filling yarn through an opening in the housing, the housing having sides provided with longitudinal slots, a front having filling cutter and filling feeler openings and a back,

(a) a longitudinal slot in the back in opposed rela tion to the filling yarn bobbin,

(b) the longitudinal slot being substantially coextensive with the filling yarn on the bobbin,

(0) whereby, upon :back and forth movement of the shuttle at high speed, a wall of air under pressure passes through said slot and impinges on the filling yarn bobbin, exerting tension on the yarn and preventing looping thereof.

8. The loom shuttle of claim 7, wherein (a) the longitudinal slot is in the range of 4 inches to 5 inches in length and inch to inch in height.

9. The loom shuttle of claim 8 wherein (a) the longitudinal slot is approximately 4 inches in length and /2 inch in height.

10. The loom shuttle of claim 7, with the addition of (a) a strip of tensioning material affixed to an inner wall of the housing in tensioning engagement with the filling yarn on the bobbin.

References Cited UNITED STATES PATENTS 1,472,720 10/1923 Klerx 139-196 1,687,467 10/1928 Stimpson M 139213 1,975,019 9/1934 Pavia 1392'13 2,076,424 4/1937 Boardman 139213 2,385,718 9/1945 Menking l39196 FOREIGN PATENTS 138,058 2/ 1920 Great Britain. 377,934 8/1932 Great Britain.

JAMES KEE CHI, Primary Examiner US. Cl. X.R. 

